EP2486022A1 - 1, 2, 4 - triazine utilisable comme accelerateur de vulcanisation et son procede d'obtention - Google Patents
1, 2, 4 - triazine utilisable comme accelerateur de vulcanisation et son procede d'obtentionInfo
- Publication number
- EP2486022A1 EP2486022A1 EP10762923A EP10762923A EP2486022A1 EP 2486022 A1 EP2486022 A1 EP 2486022A1 EP 10762923 A EP10762923 A EP 10762923A EP 10762923 A EP10762923 A EP 10762923A EP 2486022 A1 EP2486022 A1 EP 2486022A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- triazine
- formula
- compound
- group
- heteroatoms
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D253/00—Heterocyclic compounds containing six-membered rings having three nitrogen atoms as the only ring hetero atoms, not provided for by group C07D251/00
- C07D253/02—Heterocyclic compounds containing six-membered rings having three nitrogen atoms as the only ring hetero atoms, not provided for by group C07D251/00 not condensed with other rings
- C07D253/06—1,2,4-Triazines
- C07D253/065—1,2,4-Triazines having three double bonds between ring members or between ring members and non-ring members
- C07D253/07—1,2,4-Triazines having three double bonds between ring members or between ring members and non-ring members with hetero atoms, or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/43—Compounds containing sulfur bound to nitrogen
Definitions
- 1,2,4-Triazine usable as a vulcanization accelerator and its process for obtaining
- the present invention relates to a particular triazine, to its process for obtaining and to its use as a vulcanization accelerator.
- a relatively complex vulcanization system comprising, in addition to sulfur, a primary vulcanization accelerator, such as sulphonamides with a benzothiazole nucleus, as well as various secondary accelerators or vulcanization activators, especially derivatives thereof, is used.
- a primary vulcanization accelerator such as sulphonamides with a benzothiazole nucleus
- various secondary accelerators or vulcanization activators especially derivatives thereof
- Such vulcanization accelerators for use in rubber compositions based on diene elastomers and reinforcing fillers that can be used in particular for the manufacture of tires, must induce sufficient crosslinking while retaining a lag phase (time required at the beginning of the process). vulcanization) correct or even improved.
- Vulcanization accelerators play an important role in obtaining a delay phase (induction delay), and it is known to those skilled in the art that this parameter is very difficult to adjust. It is therefore particularly advantageous for those skilled in the art to have a vulcanization accelerator inducing a long delay phase, which it can adjust if it wishes by the addition of complementary accelerators.
- the Applicant has discovered that a particular triazine compound, 1,2,4-triazine, can be used as a vulcanization accelerator and allows to further improve the rheometric properties of a rubber composition using such a compound, without damaging the other properties of such a composition.
- the subject of the invention is therefore a 1,2,4-triazine of formula
- R 1 and R 2 independently represent H or a C 1 -C 25 hydrocarbon-based group chosen from linear, branched or cyclic alkyl groups, and aryl groups, optionally interrupted by one or more heteroatoms, Ri and R 2 being able to form a ring together,
- R3 represents:
- a linear or branched C1-C25 alkyl group optionally interrupted by one or more heteroatoms, optionally substituted by one or more C3-C10 cyclic alkyl groups or C 6 -C 12 aryl groups, or
- a C 3 -C 10 cyclic alkyl group optionally interrupted by one or more heteroatoms, optionally substituted with one or more linear, branched or cyclic C 1 -C 25 or C 6 -C 12 aryl groups, optionally interrupted by one or more heteroatoms.
- the subject of the invention is also the use, as a vulcanization accelerator, of a 1,2,4-triazine as defined above.
- the subject of the invention is also a process for the preparation of a 1,2,4-triazine as defined above by oxidative coupling between
- R 1 and R 2 are as previously defined, and
- the oxidative coupling being carried out by means of a basic composition and an oxidizing compound.
- the rubber compositions, in which the 1,2,4-triazine vulcanization accelerators are tested, are characterized, after curing, as indicated below.
- the measurements are carried out at 150 ° C. with an oscillating chamber rheometer according to DIN 53529 - Part 3 (June 1983).
- T 0 is the induction time, that is to say the time required for the beginning of the vulcanization reaction
- T a e.g., T 99
- cc% e.g. 99%
- the first subject of the invention is a 1,2,4-triazine of formula (I) below:
- R 1 and R 2 independently represent H or a C 1 -C 25 hydrocarbon-based group chosen from linear, branched or cyclic alkyl groups, and aryl groups, optionally interrupted by one or more heteroatoms, Ri and R 2 being able to form a ring together,
- R3 represents:
- a linear or branched C1-C25 alkyl group optionally interrupted by one or more heteroatoms, optionally substituted by one or more C3-C10 cyclic alkyl groups or C 6 -C 12 aryl groups, or
- a C 3 -C 10 cyclic alkyl group optionally interrupted by one or more heteroatoms, optionally substituted with one or more linear, branched or cyclic C 1 -C 25 or C 6 -C 12 aryl groups, optionally interrupted by one or more heteroatoms; .
- cyclic alkyl group is meant an alkyl group consisting of one or more rings.
- the heteroatom (s) may be a nitrogen, sulfur or oxygen atom.
- R 1 and R 2 independently represent H, a methyl group or a phenyl group.
- R 1 or R 2 represent a phenyl group.
- R 2 is phenyl and R 1 is hydrogen.
- R 3 may represent a cyclohexyl group or a tertbutyl group. Preferably, R 3 represents a tertbutyl group.
- a preferred 1,2,4-triazine of formula (I) is that wherein R 1 is hydrogen, R 2 is phenyl and R 3 is cyclohexyl.
- R 1 is hydrogen
- R 2 is phenyl
- R 3 is cyclohexyl.
- Such a compound is 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine (also called N-cyclohexyl-S- (5-phenyl-1,2,4-triazin-3-yl) thiohydroxylamine).
- Another preferred 1,2,4-triazine of formula (I) is that wherein R 1 is hydrogen, R 2 is phenyl and R 3 is tert-butyl. Such a compound is 3 - [(t-butylamino) thio] -5-phenyl-1,2,4-triazine.
- the 1,2,4-triazines of formula (I) can be prepared by oxidative coupling between
- R 1 and R 2 are as previously defined, and
- the 1,2,4-triazines of formula (I) may be prepared according to a synthesis method comprising the following steps:
- R 1 and R 2 are as defined above,
- 1,2,4-triazine-3-thiol can be obtained, without this being limiting, by condensation between a 1,2-dicarbonyl compound and thiosemicarbazide according to generic methods described for example in the Journal of Organic Chemistry, Flight 52, No. 19, 1987, p4280-4287 or by LM Mironovich and VK Promonenkov in the chapter titled 1, 2,4-Triazines of volume 22 of the book Balance sheets of science and technology. Series Organic Chemistry published in 1990 by Viniti in Moscow;
- the compound (A) is reacted with the basic composition which may be an aqueous solution of an organic or inorganic base, for example an aqueous solution of sodium hydroxide, and then
- the primary amine of formula R 3 NH 2 or R 3 is as defined above, and the oxidizing coupling is carried out in the presence of the oxidizing compound which may be for example a halogenated compound such as chlorine, dibroma, diiod, hypohalogenous acids or their alkaline salts such as for example sodium hypochlorite.
- the oxidizing compound which may be for example a halogenated compound such as chlorine, dibroma, diiod, hypohalogenous acids or their alkaline salts such as for example sodium hypochlorite.
- R 1 is hydrogen and R 2 is phenyl.
- R 3 represents a cyclohexyl group.
- the 1,2,4-triazines of formula (I) can be prepared according to a synthesis method comprising the following steps:
- R 1 is hydrogen and R 2 is phenyl.
- R 3 represents a tertbutyl group.
- the basic composition may be an aqueous solution of an organic or inorganic base, for example an aqueous solution of sodium hydroxide.
- the oxidizing compound may be chosen from halogenated compounds, preferably chlorine, dibromide, diiodine and hypohalogenic acids and their alkaline salts.
- halogenated compounds preferably chlorine, dibromide, diiodine and hypohalogenic acids and their alkaline salts.
- sodium hypochlorite may be mentioned.
- the 1,2,4-triazine compound of the invention finds an advantageous industrial application as a vulcanization accelerator. It can therefore be used in a rubber composition for the manufacture of tires, based on one or more diene elastomers, one or more reinforcing fillers and a vulcanization system.
- the diene elastomer or elastomers are preferably chosen from the group of highly unsaturated diene elastomers consisting of po lybutadienes (abbreviated as "BR"), polyisoprene (IR) synthesis, natural rubber (NR), butadiene copolymers, isoprene copolymers and mixtures of these elastomers.
- BR po lybutadienes
- IR polyisoprene
- NR natural rubber
- butadiene copolymers isoprene copolymers and mixtures of these elastomers.
- Such copolymers are more preferably selected from the group consisting of butadiene-styrene copolymers (SBR), isoprene-butadiene copolymers (BIR), isoprene-styrene copolymers (SIR) and isoprene-butadiene-styrene copolymers (SBIR) .
- SBR butadiene-styrene copolymers
- BIR isoprene-butadiene copolymers
- SIR isoprene-styrene copolymers
- SBIR isoprene-butadiene-styrene copolymers
- any type of reinforcing filler known for its ability to reinforce a rubber composition that can be used for manufacturing tires for example an organic filler such as carbon black, a reinforcing inorganic filler such as silica, or a blend of these two types of filler, including a carbon black and silica blend.
- any inorganic or mineral filler (regardless of its color and origin (natural or synthetic), also called “white” filler, “clear” filler or “non-black filler” as opposed to carbon black, capable of reinforcing on its own, without any other means than an intermediate coupling agent, a rubber composition intended for the manufacture of tires, in other words, able to replace, in its reinforcing function, a conventional carbon black of pneumatic grade, such a charge is generally characterized, in a known manner, by the presence of hydroxyl groups (-OH) on its surface.
- -OH hydroxyl groups
- Suitable reinforcing inorganic fillers are mineral fillers of the siliceous type, in particular silica (SiO 2 ).
- the vulcanization system itself is based on sulfur (or a sulfur-donor agent) and a primary vulcanization accelerator.
- sulfur or a sulfur-donor agent
- a primary vulcanization accelerator To this basic vulcanization system are added various known secondary accelerators or vulcanization activators such as zinc oxide, stearic acid or equivalent compounds, guanidine derivatives (in particular diphenylguanidine).
- the primary vulcanization accelerator must allow crosslinking of the rubber compositions in times industrially acceptable, while preserving a minimum period of safety ("roasting time") during which the compositions can be shaped without risk of premature vulcanization (“roasting").
- the 1,2,4-triazine compound according to the invention can therefore be used as a vulcanization accelerator. It replaces all or part of the usual compounds, including sulfenamides.
- Petroleum ether (100 ml) is added and the reaction medium is then stirred for 15 to 30 minutes at a temperature between 0 and -4 ° C. The precipitate is filtered and washed with water (200 ml) and petroleum ether (50 ml) and finally dried for 2 to 3 hours under reduced pressure.
- the diene elastomer (s), the reinforcing filler or fillers are introduced into an internal mixer, filled to 70% and whose initial tank temperature is approximately 90 ° C. the coupling agent and then, after one to two minutes of mixing, the various other ingredients with the exception of the vulcanization system.
- Thermomechanical work (non-productive phase) is then carried out in one step (total mixing time equal to about 5 minutes), until a maximum temperature of "fall” of about 165 ° C. is reached.
- the mixture thus obtained is recovered, cooled and the vulcanization system (sulfur and triazine compound (or "CBS” for example) is added. comparative)) on an external mixer (homo-finisher) at 70 ° C, mixing the whole (productive phase) for about 5 to 6 min.
- compositions thus obtained are then calendered either in the form of plates (thickness of 2 to 3 mm) or thin sheets of rubber for the measurement of their physical or mechanical properties, or in the form of profiles which can be used directly, after cutting and or assembly to the desired dimensions, for example as semi-finished products for tires, in particular as treads of tires.
- the purpose of this example is to compare the properties of a rubber composition comprising carbon black as a majority reinforcing filler, usable for the manufacture of a tire tread, including 3 - [(cyclohexylamino). ) thio] -5-phenyl-1,2,4-triazine (Compound B) as the primary vulcanization accelerator (Composition 2) with the properties of a rubber composition comprising N-cyclohexyl-2-benzothiazyl sulfenamide (“CB S”) (composition 1).
- compositions are given in Table 2. The amounts are expressed in parts per 100 parts by weight of elastomer (phr).
- the rubber composition 2 comprising 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine is identical to the composition 1, it being understood that the CBS is replaced by an isomolar amount of 3 - [( cyclohexylamino) thio] -5-phenyl-1,2,4-triazine.
- composition 2 containing 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine are equivalent to those obtained for composition 1 containing CB S. It is even noted that the delay phase (induction delay t 0 ) is longer in the case of composition 2 containing 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine, which is advantageous.
- compound B as well as the compounds of formula (I) in general, advantageously replace, with respect to the environmental impact, mercaptobenzothiazole ring sulfenamides, by not generating, unlike the latter, of mercaptobenzothiazole by decomposing during cooking.
- composition 3 The objective of this example is to compare the properties of a rubber composition comprising silica as a majority reinforcing filler, which can be used for the manufacture of a tire tread, comprising 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine (compound B) as a primary vulcanization accelerator (composition 4) with the properties of a rubber composition comprising N-cyclohexyl-2 benzothiazyl sulfenamide (“CBS”) (composition 3).
- the formulations of the compositions are given in Table 4. The amounts are expressed in parts per 100 parts by weight of elastomer (phr).
- the rubber composition 4 comprising 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine is identical to the composition 3, it being understood that the CBS is replaced by an isomeric amount of 3 - [ (cyclohexylamino) thio] -5-phenyl-1,2,4-triazine.
- composition 4 containing 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine are equivalent to those obtained for composition 1 containing CBS. It is even noted that the delay phase (induction delay t 0 ) is longer in the case of composition 4 containing 3 - [(cyclohexylamino) thio] -5-phenyl-1,2,4-triazine, which is advantageous.
- the temperature of the bath is maintained between -10 ° C and -5 ° C.
- To this solution maintained at 0 ° C is added dropwise for 90 minutes a solution of 5-phenyl-1,2,4-triazine-3-thiol (40.30 g, 0.213 mol, purity: about 98 mol%, determined by NMR), sodium hydroxide (16.96 g, 0.424 mol) and tert-butylamine (50 mL) in water (350 mL).
- the temperature of the reaction medium remains between 0 and + 6 ° C.
- the reaction medium is then stirred for one hour at a temperature between +5 and + 10 ° C. and then for 2 hours at room temperature.
- This medium is then diluted with 0.7 L of cold water (approximately 4 ° C.). This suspension is stirred for 10 minutes and the precipitate of the product obtained is filtered and washed on the filter with water (10 times 500 ml) and then dried for 48 hours in air. A yellow solid (49.5 g, 0.190 mol, 89% yield) with a melting point of 73 ° C. is obtained. The molar purity determined by NMR ! H is 95%.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Plural Heterocyclic Compounds (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0957036A FR2951167B1 (fr) | 2009-10-08 | 2009-10-08 | 1,2,4-triazine utilisable comme accelerateur de vulcanisation et son procede d'obtention |
| PCT/EP2010/065067 WO2011042521A1 (fr) | 2009-10-08 | 2010-10-08 | 1, 2, 4 - triazine utilisable comme accelerateur de vulcanisation et son procede d'obtention |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2486022A1 true EP2486022A1 (fr) | 2012-08-15 |
| EP2486022B1 EP2486022B1 (fr) | 2015-08-05 |
Family
ID=42101743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10762923.0A Active EP2486022B1 (fr) | 2009-10-08 | 2010-10-08 | 1, 2, 4 - triazine utilisable comme accélérateur de vulcanisation et son procédé d'obtention |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US8765943B2 (fr) |
| EP (1) | EP2486022B1 (fr) |
| JP (1) | JP2013507342A (fr) |
| CN (1) | CN102574820B (fr) |
| BR (1) | BR112012008017A2 (fr) |
| EA (1) | EA021412B1 (fr) |
| FR (1) | FR2951167B1 (fr) |
| WO (1) | WO2011042521A1 (fr) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2951183B1 (fr) * | 2009-10-08 | 2012-04-27 | Michelin Soc Tech | Composition de caoutchouc comprenant une 1,2,4-triazine |
| FR3005469B1 (fr) * | 2013-05-07 | 2015-05-01 | Michelin & Cie | Pneumatique comprenant une composition essentiellement depourvue de derive guanidique et comprenant un compose triazine et une etheramine primaire |
| FR3005468B1 (fr) | 2013-05-07 | 2015-05-01 | Michelin & Cie | Pneumatique comprenant une composition essentiellement depourvue de derive guanidique et comprenant un compose triazine et une amine primaire |
| FR3005470B1 (fr) | 2013-05-07 | 2015-05-01 | Michelin & Cie | Pneumatique comprenant une composition essentiellement depourvue de derive guanidique et comprenant un compose triazine et un hydroxyde de metal alcalin ou alcalino-terreux |
| DE102015203869A1 (de) * | 2014-10-06 | 2016-04-07 | Continental Reifen Deutschland Gmbh | Schwefelvernetzbare Kautschukmischung und Fahrzeugreifen |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL276475A (fr) * | 1961-03-28 | |||
| US4301260A (en) * | 1980-05-12 | 1981-11-17 | Monsanto Company | Vulcanizable rubber compositions scorch inhibited by 2-(thioamino)-4,6-diamino-1,3,5-triazines |
| US5079305A (en) * | 1989-09-05 | 1992-01-07 | Monsanto Company | Rubber compositions comprising sulfenimide accelerators |
| US5436346A (en) * | 1991-12-21 | 1995-07-25 | Akzo Nobel N.V. | Process for the preparation of benzothiazolyl-2-sulphenamides |
| WO1993025537A1 (fr) * | 1992-06-05 | 1993-12-23 | Monsanto Company | Derives de 3-pyridazine et leur utilisation dans le caoutchouc |
| FR2951183B1 (fr) * | 2009-10-08 | 2012-04-27 | Michelin Soc Tech | Composition de caoutchouc comprenant une 1,2,4-triazine |
-
2009
- 2009-10-08 FR FR0957036A patent/FR2951167B1/fr not_active Expired - Fee Related
-
2010
- 2010-10-08 JP JP2012532606A patent/JP2013507342A/ja not_active Withdrawn
- 2010-10-08 EA EA201270390A patent/EA021412B1/ru not_active IP Right Cessation
- 2010-10-08 BR BR112012008017A patent/BR112012008017A2/pt not_active Application Discontinuation
- 2010-10-08 CN CN201080044925.6A patent/CN102574820B/zh active Active
- 2010-10-08 US US13/501,092 patent/US8765943B2/en active Active
- 2010-10-08 EP EP10762923.0A patent/EP2486022B1/fr active Active
- 2010-10-08 WO PCT/EP2010/065067 patent/WO2011042521A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2011042521A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| BR112012008017A2 (pt) | 2015-09-22 |
| CN102574820B (zh) | 2014-07-30 |
| US20130053559A1 (en) | 2013-02-28 |
| EP2486022B1 (fr) | 2015-08-05 |
| JP2013507342A (ja) | 2013-03-04 |
| EA201270390A1 (ru) | 2012-09-28 |
| WO2011042521A1 (fr) | 2011-04-14 |
| US8765943B2 (en) | 2014-07-01 |
| FR2951167A1 (fr) | 2011-04-15 |
| FR2951167B1 (fr) | 2011-10-28 |
| CN102574820A (zh) | 2012-07-11 |
| EA021412B1 (ru) | 2015-06-30 |
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